Flashcards in chapter 12 Deck (19)

Loading flashcards...

1

## the study of populations

### Demography

2

##
in a population, the number of new individuals that are produced per unit of time minus the number of individuals that die.

### Growth rate

3

##
): the highest possible per capita growth rate for a population.

### Intrinsic growth rate (r):

4

##
: appropriate when young individuals are added to the population continuously

### Exponential growth

5

## appropriate when young individuals are added to the population at discrete intervals

### Geometric growth

6

## a model of population growth in which the population increases continuously at an exponential rate; can be described by the equation:

### Exponential growth model

7

##
the shape of exponential growth when graphed.

###
J-shaped curve:

8

##
occurs when babies are born continuously (i.e. 12 months out of the year)

### Exponential growth

9

##
a model of population growth that compares population sizes at regular time intervals.

### Geometric growth model

10

##
factors that limit population size regardless of the population’s density.

### Density independent

11

##
factors that affect population size in relation to the population’s density.

### Density dependent

12

##
when the rate of population growth decreases as population density increases.

### Negative density dependence

13

## The most common factors that cause negative density dependence are

### limiting resources (e.g., food, nesting sites, physical space).

14

## Crowded populations can also

### generate stress, transmit disease, and attract predators.

15

## Populations are often regulated by BOTH

###
positive & negative density dependence.

16

##
the maximum population size that can be supported by the environment.

### Carrying capacity (K):

17

## a growth model that describes slowing growth of populations at high densities; it is represented by:

### Logistic growth model

18

## the shape of the curve when a population is graphed over time using the logistic growth model

### S-shaped curve

19